Shows the year when the current water heating system was first put in place.
The installation year helps potential buyers understand the water heater's age and condition. Most water heaters have a typical lifespan of 8-12 years, and knowing the installation year can indicate whether the system may need replacement or repairs soon.
| Median | Mean | Mode |
|---|---|---|
| - | - | - |
| Location | Median | Mean | Mode |
|---|---|---|---|
| Unknown | - | - | - |